Concentrator.



A. J. MAI ltn.

CONCENTRATOR.

APPLICATION FILED MAY 5. 1913.

Patented NOV. 30, 1915.

Mum 2652a 6% %m M ALBERT J. MATTER, OF PORTLAND, OREGON.

CONCENTBATOB.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed May 5, 1913. Serial No. 765,462.

1 '0 all whom it may concern:

Be it known that I, Annnirr J. Mama, a citizen of the United States,residing at Portland, in the county of Multnomah and State of Oregon,have invented a new and useful Improvement in Concentrators, of whichthe following is a specification.

This invention relates to improvements in concentrators and has for itsobject a more thorough and uniform concentration of minerals than hasheretofore been possible.

I attain this object by means of the improvements illustrated in theaccompanying drawings in which;

Figure 1 is a sectional elevation. Fig. 2 shows a top view. Fig. 5-3 isa top view of the overflow basin. Fig. a is a top view of the glassretainer and receptacle holder.

Like reference numerals indicate similar parts throughout the severalviews.

Referring to the drawings, in Figs. 1 and 2 are shown a hopper l mountedin a frame 2 and carrying a water-discharge tube 9 mounted on bracketsti and provided with discharge orifices 11. A feed-pipe 10 is connectedwith discharge tube 9 at its upper end. Hopper 1 is provided with anopening 11 which may be closed or partially closed as desired by meansof a valve 15 held in place by valve stem 8 which passes through waterdischarge tube 9 and may be raised or lowered by means of the screwhand-wheel 7. A sand-feed tube 16 having a llared opening 13 at the topand a converging opening at the bottom, is held below the hopper openingby means of suspension bars 12.

The parts just described constitute the sand hopper and feed-tubes.

A separating-tube 5 having an enlarged end 1 is so held in the framethat the enlarged end & surrounds the sand-feed tube 16 as shown inFig. 1. An overflow basin 3 surrounds the separating tube near its upperend. The lower end of the separating tube 5 is provided with a flaringend surrounded by a water-distributing chamber connected by a pipe 17with a constant-pressure water supply source. A valve 18 is provided forthe purpose of regulating the flow of water through pipe 17. A baseplate22 having an orifice 23, and a funnel 24 rovided with an opening 25 isheld against the open bottom of the water chamber 20 and at a slightdistance from the flared end of separating tube 5 so as to form a narrowwater passage from the water chamber 20 to said separating tube 5, thuscausing the water to enter said separating tube from all sides at auniform pressure. A glass cylinder 28 is held below base-plate 22 bymeans of a holder 19 and bolts 27 which also hold the mineral receptacle31 in place. A lower cutoif valve 26 is threaded at and screws intoholder 19, passing through a tube and thence through the bottom ofreceptacle 31 and may be operated by means of a wrench applied to thesquared end 35. To prevent leakage through the opening in tube 32, a cap8-1 is provided as shown. A drain-pipe 30 is also provided in thereceptacle 31 and is provided with a drain-cock 29.

In operation, water is admitted through valve 18 and pipe 17 todistributing chamber 20 and thence upward through passage 21 intoseparating tube 0. With draincock .29 closed, the water will fillreceptacle 31 and then flow up through separating tube 5 and intooverflow basin '3 from which it may be directed into anotherconcentrator if desired. The hopper 1 is filled with goldbearing sand ortailings and valve 15 is then opened, allowing the sand to enterseparating tube 5 by way of pipe 16. \Vhen wet sand is used water may beforced through pipe 10 and Water-discharge tube 9 and thence throughorifices 11 so as to wash the sand into said separating tube. The valve18 may now be regulated so that the water (lowing upward throughseparating tube 5 has just sutficient force to carry away the light sandbut not enough force to lift the heavier particles of gold, thusallowing the gold or other precious metal to settle in the receptacle 31which may be emptied when desired by removing the lower nuts of bolts27. Before removing receptacle 31, cap 31 is removed, a wrench isapplied to squared end of valve 26 so as to close opening 25. The wateris then drained from the top of receptacle 31 through drainpipe 30. Byproperly regulating the low of water through valve 18 various degrees ofconcentration and separation may be secured.

What is claimed is:

A mineral separator comprising a sand feed pipe vertically disposed andhaving a tapering lower end; the intermediate portion being of tubularform, and a vertically disposed separating tube having a cylindric111portion of its iffiper end so disposed 'as" dbi vnwn'rdin' the form of atube having the to entirely surround said sand feed pipe, same crosssectional area as the water pusleuvmg an unobstructed water passage ofsage aforementioned.

uniform cross section around the outside of Signed in the presence oftwo witnesses. said sand feed pipe, the lower end ofthe' ALBERT J.MATTER. cylindrical portion of said separating tube Witnesses:

converging at a point adjacent to the lower' HENMNG Hommsox,

end of said sand feed pipe and continuing J. H. Soon.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

